java test if a string is a int
public static boolean isInt(String str) {
try {
@SuppressWarnings("unused")
int x = Integer.parseInt(str);
return true; //String is an Integer
} catch (NumberFormatException e) {
return false; //String is not an Integer
}
}java how to check string is number
public static boolean isNumeric(String strNum) {
if (strNum == null) {
return false;
}
try {
double d = Double.parseDouble(strNum);
} catch (NumberFormatException nfe) {
return false;
}
return true;
}java check if int
//"% (modulo)" calulates the remainder when the value on the left is divided by the value on the right
float number = 20;
if(number%1 == 0){
println("It is an integer");
} else {
println("It is not an integer");
}determine if is string or int
string str = "3257fg";
for(int i = 0;i < (strlen(str) - 1);i++) {
if((int)str[i] < 10) {
// it is a number, so do some code
} else {
// it is not a number, do something else
}
}Copyright © 2021 Codeinu
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